INFO: task syz.1.58:4107 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.58        state:D stack:0     pid:4107  tgid:4105  ppid:3179   flags:0x00000006
Call Trace:
[<ffffffff85fe3a74>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a74>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6664>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6664>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85fe693c>] io_schedule+0x78/0xd4 kernel/sched/core.c:7552
[<ffffffff806fac7c>] folio_wait_bit_common+0x398/0x944 mm/filemap.c:1309
[<ffffffff80705210>] __folio_lock mm/filemap.c:1647 [inline]
[<ffffffff80705210>] folio_lock include/linux/pagemap.h:1148 [inline]
[<ffffffff80705210>] folio_lock include/linux/pagemap.h:1144 [inline]
[<ffffffff80705210>] __filemap_get_folio+0x470/0x866 mm/filemap.c:1900
[<ffffffff807454d2>] truncate_inode_pages_range+0x344/0xd78 mm/truncate.c:351
[<ffffffff80745f28>] truncate_inode_pages+0x22/0x2e mm/truncate.c:423
[<ffffffff8126feca>] kill_bdev block/bdev.c:91 [inline]
[<ffffffff8126feca>] blkdev_flush_mapping+0xf8/0x28a block/bdev.c:671
[<ffffffff8127012a>] blkdev_put_whole+0xce/0xee block/bdev.c:678
[<ffffffff81273af4>] bdev_release+0x3fe/0x600 block/bdev.c:1103
[<ffffffff81274ad6>] blkdev_release+0x1a/0x26 block/fops.c:639
[<ffffffff80a2c758>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2ce6c>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014fb7c>] task_work_run+0x16a/0x25e kernel/task_work.c:228
[<ffffffff8010be48>] get_signal+0x1aa/0x23b0 kernel/signal.c:2690
[<ffffffff8000bb06>] arch_do_signal_or_restart+0x8d6/0x1190 arch/riscv/kernel/signal.c:437
[<ffffffff85fdac04>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff85fdac04>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdac04>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fdac04>] syscall_exit_to_user_mode+0x2a6/0x31e kernel/entry/common.c:218
[<ffffffff85fd9b26>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
 #0: ff60000018c71148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff200000000c7c90 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
 #2: ffffffff893adde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79
1 lock held by khungtaskd/37:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
2 locks held by getty/3140:
 #0: ff6000001b23d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211
1 lock held by syz-executor/3174:
3 locks held by kworker/1:1/3799:
1 lock held by syz.1.58/4107:
 #0: ff6000001a1824c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x12c/0x600 block/bdev.c:1087
3 locks held by kworker/0:5/4556:
1 lock held by syz-executor/4842:
 #0: ffffffff893adde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff893adde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdbe net/core/rtnetlink.c:6643
5 locks held by syz.2.180/5307:
1 lock held by dhcpcd-run-hook/5308:

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd797a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd797a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd7a0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3faae>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd66>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019974>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c3c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c3c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c3c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5307 Comm: syz.2.180 Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
Hardware name: riscv-virtio,qemu (DT)
epc : neigh_sysctl_register+0x258/0x558 net/core/neighbour.c:3847
 ra : neigh_sysctl_register+0x258/0x558 net/core/neighbour.c:3847
epc : ffffffff84d40a34 ra : ffffffff84d40a34 sp : ff200000051b7740
 gp : ffffffff897bea80 tp : ff6000001dde4ec0 t0 : 0000000000000000
 t1 : 000001a400000004 t2 : ffffffff8714f640 s0 : ff200000051b7870
 s1 : 0000000000000011 a0 : 0000000000000005 a1 : 000000000000000a
 a2 : 000000000000000a a3 : ffffffff84d40a34 a4 : 0000000000000002
 a5 : ff6000001dde5ec0 a6 : 0000000000000003 a7 : ffffffff8714f680
 s2 : 000000000000000a s3 : 0000000000000014 s4 : dfffffff00000000
 s5 : ff6000002951d900 s6 : ff60000031548130 s7 : ff6000002cd76000
 s8 : ff200000051b7790 s9 : ffffffff857d1cd8 s10: 1fe4000000a36eec
 s11: ff6000002951d974 t3 : 0000000000000000 t4 : 000001a400000004
 t5 : ffffffff800ed0fe t6 : ff6000002cd764a0
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff84d40a34>] neigh_sysctl_register+0x258/0x558 net/core/neighbour.c:3847
[<ffffffff857598b4>] addrconf_sysctl_register+0xc2/0x1d8 net/ipv6/addrconf.c:7268
[<ffffffff8575a340>] ipv6_add_dev+0x976/0x13a4 net/ipv6/addrconf.c:456
[<ffffffff8577191e>] addrconf_notify+0x4b6/0x187a net/ipv6/addrconf.c:3655
[<ffffffff80160b10>] notifier_call_chain+0x19c/0x58e kernel/notifier.c:93
[<ffffffff80161088>] raw_notifier_call_chain+0x2a/0x38 kernel/notifier.c:461
[<ffffffff84d0d852>] call_netdevice_notifiers_info+0xbe/0x144 net/core/dev.c:1996
[<ffffffff84d369de>] call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
[<ffffffff84d369de>] call_netdevice_notifiers net/core/dev.c:2048 [inline]
[<ffffffff84d369de>] register_netdevice+0x14a6/0x1dce net/core/dev.c:10520
[<ffffffff82f50fa6>] tun_set_iff drivers/net/tun.c:2862 [inline]
[<ffffffff82f50fa6>] __tun_chr_ioctl+0x2cc6/0x4590 drivers/net/tun.c:3131
[<ffffffff82f528d6>] tun_chr_ioctl+0x2a/0x38 drivers/net/tun.c:3418
[<ffffffff80a76790>] vfs_ioctl fs/ioctl.c:51 [inline]
[<ffffffff80a76790>] __do_sys_ioctl fs/ioctl.c:907 [inline]
[<ffffffff80a76790>] __se_sys_ioctl fs/ioctl.c:893 [inline]
[<ffffffff80a76790>] __riscv_sys_ioctl+0x182/0x1e6 fs/ioctl.c:893
[<ffffffff8000f2d4>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff85fd9c4a>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce